docs: add style rule regarding initialization

Specifically, specify that each initialization should be done on a
separate line.

2 files changed, 6 insertions, 3 deletions

diff --git a/src/nvim/lua/stdlib.c b/src/nvim/lua/stdlib.c
index fc2fedeaa1..4b7d2dab21 100644
--- a/src/nvim/lua/stdlib.c
+++ b/src/nvim/lua/stdlib.c
@@ -82,7 +82,8 @@ static int regex_match_line(lua_State *lstate)
 
   handle_T bufnr = (handle_T)luaL_checkinteger(lstate, 2);
   linenr_T rownr = (linenr_T)luaL_checkinteger(lstate, 3);
-  int start = 0, end = -1;
+  int start = 0;
+  int end = -1;
   if (narg >= 4) {
     start = (int)luaL_checkinteger(lstate, 4);
   }
@@ -177,7 +178,8 @@ int nlua_str_utfindex(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL
     }
   }
 
-  size_t codepoints = 0, codeunits = 0;
+  size_t codepoints = 0;
+  size_t codeunits = 0;
   mb_utflen(s1, (size_t)idx, &codepoints, &codeunits);
 
   lua_pushinteger(lstate, (lua_Integer)codepoints);
diff --git a/src/nvim/lua/xdiff.c b/src/nvim/lua/xdiff.c
index 16c3aa5e11..5285c1187d 100644
--- a/src/nvim/lua/xdiff.c
+++ b/src/nvim/lua/xdiff.c
@@ -74,7 +74,8 @@ static void get_linematch_results(lua_State *lstate, mmfile_t *ma, mmfile_t *mb,
   int *decisions = NULL;
   size_t decisions_length = linematch_nbuffers(diff_begin, diff_length, 2, &decisions, iwhite);
 
-  int lnuma = start_a, lnumb = start_b;
+  int lnuma = start_a;
+  int lnumb = start_b;
 
   int hunkstarta = lnuma;
   int hunkstartb = lnumb;