diff --git a/tools/gram.sed b/tools/gram.sed
index 79e2b821d0..3773119f1a 100644
--- a/tools/gram.sed
+++ b/tools/gram.sed
@@ -2,13 +2,13 @@
 /^%gram:/s/^%gram:[[:space:]]*//p
 
 # copy bnftab groups:
-/^\\begin{bnftab}/,/^\\end{bnftab}/p
+/^\\begin\{bnftab}/,/^\\end\{bnftab}/p
 
 # copy simplebnf groups:
-/^\\begin{simplebnf}/,/^\\end{simplebnf}/p
+/^\\begin\{simplebnf}/,/^\\end\{simplebnf}/p
 
 # copy bnf groups:
-/^\\begin{bnf}/,/^\\end{bnf}/p
+/^\\begin\{bnf}/,/^\\end\{bnf}/p
 
 # copy bnfkeywordtab groups:
-/^\\begin{bnfkeywordtab}/,/^\\end{bnfkeywordtab}/p
+/^\\begin\{bnfkeywordtab}/,/^\\end\{bnfkeywordtab}/p
diff --git a/tools/gramb.sed b/tools/gramb.sed
index 0a511a61c2..878e72e273 100644
--- a/tools/gramb.sed
+++ b/tools/gramb.sed
@@ -1,9 +1,9 @@
 # copy bnftab groups:
-/^\\end{bnftab}/a\
+/^\\end\{bnftab}/a\
 
 # copy simplebnf groups:
-/^\\end{simplebnf}/a\
+/^\\end\{simplebnf}/a\
 
 # copy bnf groups:
-/^\\end{bnf}/a\
+/^\\end\{bnf}/a\
 
diff --git a/tools/makegram b/tools/makegram
old mode 100644
new mode 100755
diff --git a/tools/maketags b/tools/maketags
old mode 100644
new mode 100755
diff --git a/tools/makexref b/tools/makexref
old mode 100644
new mode 100755