maint: Make code more "git diff"-friendly.

maint: Make code more "git diff"-friendly.

* gettext-runtime/src/envsubst.c: Prefer long lines to lines that start with a
non-whitespace character.
* gettext-tools/src/cldr-plurals.c: Likewise.
* gettext-tools/src/format.c: Likewise.
* gettext-tools/src/msgcmp.c: Likewise.
* gettext-tools/src/msgfmt.c: Likewise.
* gettext-tools/src/msggrep.c: Likewise.
* gettext-tools/src/msgl-cat.c: Likewise.
* gettext-tools/src/msgl-charset.c: Likewise.
* gettext-tools/src/msgl-check.c: Likewise.
* gettext-tools/src/msgl-iconv.c: Likewise.
* gettext-tools/src/msgmerge.c: Likewise.
* gettext-tools/src/po-lex.c: Likewise.
* gettext-tools/src/read-stringtable.c: Likewise.
* gettext-tools/src/recode-sr-latin.c: Likewise.
* gettext-tools/src/write-catalog.c: Likewise.
* gettext-tools/src/write-java.c: Likewise.
* gettext-tools/src/write-po.c: Likewise.
* gettext-tools/src/x-csharp.c: Likewise.
* gettext-tools/src/x-elisp.c: Likewise.
* gettext-tools/src/x-java.c: Likewise.
* gettext-tools/src/x-javascript.c: Likewise.
* gettext-tools/src/x-librep.c: Likewise.
* gettext-tools/src/x-lisp.c: Likewise.
* gettext-tools/src/x-perl.c: Likewise.
* gettext-tools/src/x-python.c: Likewise.
* gettext-tools/src/x-scheme.c: Likewise.
* gettext-tools/src/x-sh.c: Likewise.
* gettext-tools/src/x-tcl.c: Likewise.
* gettext-tools/src/x-vala.c: Likewise.
* gettext-tools/src/xg-encoding.c: Likewise.
* gettext-tools/src/xgettext.c: Likewise.