Correct missing SP characters in grammar comment at top of fast-import.c

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

fast-import.c

@@ -1,4 +1,5 @@
 /*
+(See Documentation/git-fast-import.txt for maintained documentation.)
 Format of STDIN stream:
 
   stream ::= cmd*;
@@ -18,8 +19,8 @@ Format of STDIN stream:
 
   new_commit ::= 'commit' sp ref_str lf
     mark?
-    ('author' sp name '<' email '>' when lf)?
-    'committer' sp name '<' email '>' when lf
+    ('author' sp name sp '<' email '>' sp when lf)?
+    'committer' sp name sp '<' email '>' sp when lf
     commit_msg
     ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)?
     ('merge' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)*
@@ -43,7 +44,7 @@ Format of STDIN stream:
 
   new_tag ::= 'tag' sp tag_str lf
     'from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf
-    ('tagger' sp name '<' email '>' when lf)?
+    ('tagger' sp name sp '<' email '>' sp when lf)?
     tag_msg;
   tag_msg ::= data;