patch 8.2.3320: some local functions are not static

Problem:    Some local functions are not static.
Solution:   Add "static".  Move snprintf() related code to strings.c.
            (Yegappan Lakshmanan, closes #8734)

src/alloc.c

@@ -232,19 +232,15 @@ lalloc(size_t size, int message)
     mem_pre_alloc_l(&size);
 #endif
 
-    /*
-     * Loop when out of memory: Try to release some memfile blocks and
-     * if some blocks are released call malloc again.
-     */
+    // Loop when out of memory: Try to release some memfile blocks and
+    // if some blocks are released call malloc again.
     for (;;)
     {
-	/*
-	 * Handle three kind of systems:
-	 * 1. No check for available memory: Just return.
-	 * 2. Slow check for available memory: call mch_avail_mem() after
-	 *    allocating KEEP_ROOM amount of memory.
-	 * 3. Strict check for available memory: call mch_avail_mem()
-	 */
+	// Handle three kind of systems:
+	// 1. No check for available memory: Just return.
+	// 2. Slow check for available memory: call mch_avail_mem() after
+	//    allocating KEEP_ROOM amount of memory.
+	// 3. Strict check for available memory: call mch_avail_mem()
 	if ((p = malloc(size)) != NULL)
 	{
 #ifndef HAVE_AVAIL_MEM
@@ -268,10 +264,8 @@ lalloc(size_t size, int message)
 		goto theend;
 #endif
 	}
-	/*
-	 * Remember that mf_release_all() is being called to avoid an endless
-	 * loop, because mf_release_all() may call alloc() recursively.
-	 */
+	// Remember that mf_release_all() is being called to avoid an endless
+	// loop, because mf_release_all() may call alloc() recursively.
 	if (releasing)
 	    break;
 	releasing = TRUE;

src/channel.c

@@ -3025,7 +3025,7 @@ channel_has_readahead(channel_T *channel, ch_part_T part)
  * Return a string indicating the status of the channel.
  * If "req_part" is not negative check that part.
  */
-    char *
+    static char *
 channel_status(channel_T *channel, int req_part)
 {
     ch_part_T part;

src/dict.c

@@ -805,7 +805,7 @@ dict2string(typval_T *tv, int copyID, int restore_copyID)
  * Advance over a literal key, including "-".  If the first character is not a
  * literal key character then "key" is returned.
  */
-    char_u *
+    static char_u *
 skip_literal_key(char_u *key)
 {
     char_u *p;

src/digraph.c

@@ -2029,7 +2029,7 @@ registerdigraph(int char1, int char2, int n)
  * If they are valid, returns TRUE; otherwise, give an error message and
  * returns FALSE.
  */
-    int
+    static int
 check_digraph_chars_valid(int char1, int char2)
 {
     if (char2 == 0)
@@ -2193,7 +2193,7 @@ digraph_getlist_appendpair(digr_T *dp, list_T *l)
     li2->li_tv.vval.v_string = vim_strsave(buf);
 }
 
-    void
+    static void
 digraph_getlist_common(int list_all, typval_T *rettv)
 {
     int		i;

src/edit.c

@@ -1587,7 +1587,7 @@ ins_ctrl_v(void)
  * Note that this doesn't wait for characters, they must be in the typeahead
  * buffer already.
  */
-    int
+    static int
 decodeModifyOtherKeys(int c)
 {
     char_u  *p = typebuf.tb_buf + typebuf.tb_off;

src/ex_docmd.c

@@ -598,7 +598,7 @@ do_cmdline_cmd(char_u *cmd)
  * Execute the "+cmd" argument of "edit +cmd fname" and the like.
  * This allows for using a range without ":" in Vim9 script.
  */
-    int
+    static int
 do_cmd_argument(char_u *cmd)
 {
     return do_cmdline(cmd, NULL, NULL,

src/getchar.c

@@ -631,7 +631,7 @@ stuffRedoReadbuff(char_u *s)
     add_buff(&readbuf2, s, -1L);
 }
 
-    void
+    static void
 stuffReadbuffLen(char_u *s, long len)
 {
     add_buff(&readbuf1, s, len);

src/job.c

@@ -1582,7 +1582,7 @@ invoke_prompt_interrupt(void)
 /*
  * Return the effective prompt for the specified buffer.
  */
-    char_u *
+    static char_u *
 buf_prompt_text(buf_T* buf)
 {
     if (buf->b_prompt_text == NULL)

src/list.c

@@ -620,7 +620,7 @@ list_append_tv(list_T *l, typval_T *tv)
  * As list_append_tv() but move the value instead of copying it.
  * Return FAIL when out of memory.
  */
-    int
+    static int
 list_append_tv_move(list_T *l, typval_T *tv)
 {
     listitem_T	*li = listitem_alloc();