i18n: also look in src/parse-gram.c

[Akim Demaille]

We are missing the translation of "end of file" for instance.

commit df373f1ea1eb5475eebe0a66063075748c8ee84e
Author: Akim Demaille <address@hidden>
Date:   Sun Apr 19 15:10:53 2020 +0200

    i18n: also look in src/parse-gram.c
    
    Some strings appears in the generated file only, e.g., translation of
    "end of file".  So don't forget to go and see there.

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 97f2473c..0961eca3 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -8,6 +8,7 @@ src/graphviz.c
 src/location.c
 src/main.c
 src/muscle-tab.c
+src/parse-gram.c
 src/parse-gram.y
 src/print-graph.c
 src/print.c