diff --git a/lang/pc/comp/LLlex.c b/lang/pc/comp/LLlex.c
index 4cb24d47b..294a239ea 100644
--- a/lang/pc/comp/LLlex.c
+++ b/lang/pc/comp/LLlex.c
@@ -19,8 +19,8 @@
 #include	"input.h"
 #include	"main.h"
 #include	"type.h"
-#include    "error.h"
-#include    "ack_string.h"
+#include	"error.h"
+#include	"ack_string.h"
 
 
 
diff --git a/lang/pc/comp/LLmessage.c b/lang/pc/comp/LLmessage.c
index 21b3cceac..e18c4c4cc 100644
--- a/lang/pc/comp/LLmessage.c
+++ b/lang/pc/comp/LLmessage.c
@@ -14,10 +14,10 @@
 #include	"LLlex.h"
 #include	"Lpars.h"
 #include	"idf.h"
-#include    "node.h"
+#include	"node.h"
 #include	"type.h"
-#include    "misc.h"
-#include    "error.h"
+#include	"misc.h"
+#include	"error.h"
 
 extern int expect_label;
 
diff --git a/lang/pc/comp/body.c b/lang/pc/comp/body.c
index 510c18343..81549deee 100644
--- a/lang/pc/comp/body.c
+++ b/lang/pc/comp/body.c
@@ -15,11 +15,11 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "code.h"
-#include    "chk_expr.h"
-#include    "tmpvar.h"
-#include    "typequiv.h"
-#include    "error.h"
+#include	"code.h"
+#include	"chk_expr.h"
+#include	"tmpvar.h"
+#include	"typequiv.h"
+#include	"error.h"
 
 void MarkDef(register struct node *nd, unsigned short flags, int on)
 {
diff --git a/lang/pc/comp/casestat.xc b/lang/pc/comp/casestat.xc
index 71bc95d0b..a02d05314 100644
--- a/lang/pc/comp/casestat.xc
+++ b/lang/pc/comp/casestat.xc
@@ -12,10 +12,10 @@
 #include	"main.h"
 #include	"node.h"
 #include	"type.h"
-#include    "code.h"
-#include    "error.h"
-#include    "typequiv.h"
-#include    "casestat.h"
+#include	"code.h"
+#include	"error.h"
+#include	"typequiv.h"
+#include	"casestat.h"
 
 struct case_hdr	{
 	struct case_hdr *ch_next;		/* in the free list */
diff --git a/lang/pc/comp/chk_expr.c b/lang/pc/comp/chk_expr.c
index 6ce142525..2d1f1246d 100644
--- a/lang/pc/comp/chk_expr.c
+++ b/lang/pc/comp/chk_expr.c
@@ -25,11 +25,11 @@
 #include	"required.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "typequiv.h"
-#include    "readwrite.h"
-#include    "body.h"
-#include    "cstoper.h"
-#include    "error.h"
+#include	"typequiv.h"
+#include	"readwrite.h"
+#include	"body.h"
+#include	"cstoper.h"
+#include	"error.h"
 
 static int ChkValue(register struct node *);
 static int ChkUnOper(register struct node *);
diff --git a/lang/pc/comp/declar.g b/lang/pc/comp/declar.g
index 64a7133fd..62ab8f801 100644
--- a/lang/pc/comp/declar.g
+++ b/lang/pc/comp/declar.g
@@ -21,10 +21,10 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "code.h"
-#include    "error.h"
-#include    "label.h"
-#include    "enter.h"
+#include	"code.h"
+#include	"error.h"
+#include	"label.h"
+#include	"enter.h"
 #ifdef DBSYMTAB
 #include	"stab.h"
 #endif
diff --git a/lang/pc/comp/def.c b/lang/pc/comp/def.c
index 823ee4b36..28e9e4c0d 100644
--- a/lang/pc/comp/def.c
+++ b/lang/pc/comp/def.c
@@ -15,10 +15,10 @@
 #include	"misc.h"
 #include	"node.h"
 #include	"scope.h"
-#include    "code.h"
+#include	"code.h"
 #include	"type.h"
-#include    "lookup.h"
-#include    "error.h"
+#include	"lookup.h"
+#include	"error.h"
 
 struct def *MkDef(register struct idf *id, register struct scope *scope,
 		long kind)
diff --git a/lang/pc/comp/desig.c b/lang/pc/comp/desig.c
index 3e88fd633..37a4f19bc 100644
--- a/lang/pc/comp/desig.c
+++ b/lang/pc/comp/desig.c
@@ -22,8 +22,8 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "code.h"
-#include    "error.h"
+#include	"code.h"
+#include	"error.h"
 
 struct desig	InitDesig = {DSG_INIT, 0, 0, NULLDEF, 0};
 struct withdesig *WithDesigs;
diff --git a/lang/pc/comp/enter.c b/lang/pc/comp/enter.c
index f3fc578fa..8d117bb1d 100644
--- a/lang/pc/comp/enter.c
+++ b/lang/pc/comp/enter.c
@@ -14,8 +14,8 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "progs.h"
-#include    "enter.h"
+#include	"progs.h"
+#include	"enter.h"
 #ifdef DBSYMTAB
 #include	"stab.h"
 #endif
diff --git a/lang/pc/comp/error.c b/lang/pc/comp/error.c
index 768403b2d..6713c5d94 100644
--- a/lang/pc/comp/error.c
+++ b/lang/pc/comp/error.c
@@ -16,9 +16,9 @@
 #include	<em_arith.h>
 #include	<em_label.h>
 #include	<em_code.h>
-#include    <stdlib.h>
-#include    <stdio.h>
-#include    "print.h"
+#include	<stdlib.h>
+#include	<stdio.h>
+#include	"print.h"
 #include	"system.h"
 
 #include	"LLlex.h"
diff --git a/lang/pc/comp/expression.g b/lang/pc/comp/expression.g
index 25f79de0c..c2a4b6f29 100644
--- a/lang/pc/comp/expression.g
+++ b/lang/pc/comp/expression.g
@@ -16,8 +16,8 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "code.h"
-#include    "error.h"
+#include	"code.h"
+#include	"error.h"
 }
 
 Constant(register struct node **pnd;)
diff --git a/lang/pc/comp/label.c b/lang/pc/comp/label.c
index e6e8def2e..9f65428c7 100644
--- a/lang/pc/comp/label.c
+++ b/lang/pc/comp/label.c
@@ -11,8 +11,8 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "label.h"
-#include    "error.h"
+#include	"label.h"
+#include	"error.h"
 
 static void CodeLabel(register struct def *df, int local);
 
diff --git a/lang/pc/comp/lookup.c b/lang/pc/comp/lookup.c
index ea9ab976c..f99574aa0 100644
--- a/lang/pc/comp/lookup.c
+++ b/lang/pc/comp/lookup.c
@@ -13,7 +13,7 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "lookup.h"
+#include	"lookup.h"
 
 void remove_def(register struct def *df)
 {
diff --git a/lang/pc/comp/main.c b/lang/pc/comp/main.c
index a7305e4cb..3ee5dc875 100644
--- a/lang/pc/comp/main.c
+++ b/lang/pc/comp/main.c
@@ -25,10 +25,10 @@
 #include	"tokenname.h"
 #include	"type.h"
 #include	"scope.h"
-#include    "cstoper.h"
-#include    "stab.h"
-#include    "options.h"
-#include    "error.h"
+#include	"cstoper.h"
+#include	"stab.h"
+#include	"options.h"
+#include	"error.h"
 
 char		options[128];
 char		*ProgName;
diff --git a/lang/pc/comp/misc.c b/lang/pc/comp/misc.c
index 7f4f15079..9050fc44d 100644
--- a/lang/pc/comp/misc.c
+++ b/lang/pc/comp/misc.c
@@ -12,8 +12,8 @@
 #include	"main.h"
 #include	"misc.h"
 #include	"node.h"
-#include    "print.h"
-#include    "error.h"
+#include	"print.h"
+#include	"error.h"
 
 struct idf *gen_anon_idf(void)
 {
diff --git a/lang/pc/comp/node.c b/lang/pc/comp/node.c
index 46141505e..f57ddc217 100644
--- a/lang/pc/comp/node.c
+++ b/lang/pc/comp/node.c
@@ -6,12 +6,12 @@
 #include	<alloc.h>
 #include	<em_arith.h>
 #include	<em_label.h>
-#include    "print.h"
+#include	"print.h"
 
 #include	"LLlex.h"
 #include	"node.h"
 #include	"type.h"
-#include    "error.h"
+#include	"error.h"
 
 struct node *MkNode(int class, struct node *left, struct node *right, struct token *token)
 {
diff --git a/lang/pc/comp/options.c b/lang/pc/comp/options.c
index 75df7c3ad..e7a1dd2a6 100644
--- a/lang/pc/comp/options.c
+++ b/lang/pc/comp/options.c
@@ -7,11 +7,11 @@
 #include	"class.h"
 #include	"const.h"
 #include	"main.h"
-#include    "LLlex.h"
-#include    "node.h"
+#include	"LLlex.h"
+#include	"node.h"
 #include	"type.h"
-#include    "options.h"
-#include    "error.h"
+#include	"options.h"
+#include	"error.h"
 
 
 #define	MINIDFSIZE	9
diff --git a/lang/pc/comp/program.g b/lang/pc/comp/program.g
index e82113899..743a6b375 100644
--- a/lang/pc/comp/program.g
+++ b/lang/pc/comp/program.g
@@ -15,8 +15,8 @@
 #include	"main.h"
 #include	"node.h"
 #include	"scope.h"
-#include    "enter.h"
-#include    "progs.h"
+#include	"enter.h"
+#include	"progs.h"
 #ifdef DBSYMTAB
 #include	"stab.h"
 #endif
diff --git a/lang/pc/comp/progs.c b/lang/pc/comp/progs.c
index 054cc680a..4c3cda8cb 100644
--- a/lang/pc/comp/progs.c
+++ b/lang/pc/comp/progs.c
@@ -4,7 +4,7 @@
 #include	<em.h>
 #include	<assert.h>
 
-#include    "progs.h"
+#include	"progs.h"
 #include	"LLlex.h"
 #include	"def.h"
 #include	"main.h"
diff --git a/lang/pc/comp/readwrite.c b/lang/pc/comp/readwrite.c
index 2ede52b3d..24eb2bf7e 100644
--- a/lang/pc/comp/readwrite.c
+++ b/lang/pc/comp/readwrite.c
@@ -6,7 +6,7 @@
 #include	<assert.h>
 #include	<em.h>
 
-#include    "print.h"
+#include	"print.h"
 #include	"LLlex.h"
 #include	"def.h"
 #include	"main.h"
@@ -14,11 +14,11 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "code.h"
-#include    "chk_expr.h"
-#include    "typequiv.h"
-#include    "error.h"
-#include    "readwrite.h"
+#include	"code.h"
+#include	"chk_expr.h"
+#include	"typequiv.h"
+#include	"error.h"
+#include	"readwrite.h"
 
 
 /* DEBUG */
diff --git a/lang/pc/comp/scope.c b/lang/pc/comp/scope.c
index e02d18a3b..b0995e8cc 100644
--- a/lang/pc/comp/scope.c
+++ b/lang/pc/comp/scope.c
@@ -15,8 +15,8 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "lookup.h"
-#include    "error.h"
+#include	"lookup.h"
+#include	"error.h"
 
 struct scope *GlobalScope, *PervasiveScope, *BlockScope;
 struct scopelist *CurrVis;
diff --git a/lang/pc/comp/statement.g b/lang/pc/comp/statement.g
index f11fefea6..8e747b62b 100644
--- a/lang/pc/comp/statement.g
+++ b/lang/pc/comp/statement.g
@@ -17,13 +17,13 @@
 #include	"node.h"
 #include	"scope.h"
 #include	"type.h"
-#include    "body.h"
-#include    "code.h"
-#include    "error.h"
-#include    "readwrite.h"
-#include    "casestat.h"
-#include    "tmpvar.h"
-#include    "label.h"
+#include	"body.h"
+#include	"code.h"
+#include	"error.h"
+#include	"readwrite.h"
+#include	"casestat.h"
+#include	"tmpvar.h"
+#include	"label.h"
 
 int slevel = 0;		/* nesting level of statements */
 }
diff --git a/lang/pc/comp/tmpvar.xc b/lang/pc/comp/tmpvar.xc
index 5ff5b39ca..60b79366f 100644
--- a/lang/pc/comp/tmpvar.xc
+++ b/lang/pc/comp/tmpvar.xc
@@ -13,7 +13,7 @@
 #include	<em_arith.h>
 #include	<em_label.h>
 #include	<em_reg.h>
-#include    <em_code.h>
+#include	<em_code.h>
 
 #include	"def.h"
 #include	"main.h"
diff --git a/lang/pc/comp/tokenname.c b/lang/pc/comp/tokenname.c
index 5f446ad12..063088f5d 100644
--- a/lang/pc/comp/tokenname.c
+++ b/lang/pc/comp/tokenname.c
@@ -1,11 +1,11 @@
 /* T O K E N   D E F I N I T I O N S */
 
-#include    "parameters.h"
+#include	"parameters.h"
 #include	"Lpars.h"
 #include	"LLlex.h"
 #include	"idf.h"
 #include	"tokenname.h"
-#include    "error.h"
+#include	"error.h"
 
 /*	To centralize the declaration of %tokens, their presence in this
 	file is taken as their declaration. The Makefile will produce
diff --git a/lang/pc/comp/type.c b/lang/pc/comp/type.c
index 8b8eb17f6..512e76a13 100644
--- a/lang/pc/comp/type.c
+++ b/lang/pc/comp/type.c
@@ -11,16 +11,16 @@
 
 #include	"LLlex.h"
 #include	"const.h"
-#include    "chk_expr.h"
+#include	"chk_expr.h"
 #include	"def.h"
 #include	"idf.h"
 #include	"main.h"
 #include	"node.h"
 #include	"scope.h"
-#include    "lookup.h"
+#include	"lookup.h"
 #include	"type.h"
-#include    "typequiv.h"
-#include    "error.h"
+#include	"typequiv.h"
+#include	"error.h"
 #ifdef DBSYMTAB
 #include	"stab.h"
 #endif
diff --git a/lang/pc/comp/typequiv.c b/lang/pc/comp/typequiv.c
index 929b16878..5f02a6b38 100644
--- a/lang/pc/comp/typequiv.c
+++ b/lang/pc/comp/typequiv.c
@@ -14,8 +14,8 @@
 #include	"def.h"
 #include	"node.h"
 #include	"type.h"
-#include    "error.h"
-#include    "typequiv.h"
+#include	"error.h"
+#include	"typequiv.h"
 
 int TstTypeEquiv(register struct type *tp1, register struct type *tp2)
 {