Merge branch 'rs/cocci-strbuf-addf-to-addstr' into maint

* rs/cocci-strbuf-addf-to-addstr:
  cocci: simplify check for trivial format strings

contrib/coccinelle/strbuf.cocci

 @ strbuf_addf_with_format_only @
 expression E;
-constant fmt;
-@@
-  strbuf_addf(E,
-(
-  fmt
-|
-  _(fmt)
-)
-  );
-
-@ script:python @
-fmt << strbuf_addf_with_format_only.fmt;
-@@
-cocci.include_match("%" not in fmt)
-
-@ extends strbuf_addf_with_format_only @
+constant fmt !~ "%";
 @@
 - strbuf_addf
 + strbuf_addstr