patch 8.2.2885: searching for \%'> does not match linewise end of line

Problem:    searching for \%'> does not match linewise end of line. (Tim Chase)
Solution:   Match end of line if column is MAXCOL. (closes #8238)
diff --git a/src/regexp_bt.c b/src/regexp_bt.c
index afea5e4..70ddfe9 100644
--- a/src/regexp_bt.c
+++ b/src/regexp_bt.c
@@ -3357,17 +3357,29 @@
 
 		pos = getmark_buf(rex.reg_buf, mark, FALSE);
 		if (pos == NULL		     // mark doesn't exist
-			|| pos->lnum <= 0    // mark isn't set in reg_buf
-			|| (pos->lnum == rex.lnum + rex.reg_firstlnum
-				? (pos->col == (colnr_T)(rex.input - rex.line)
+			|| pos->lnum <= 0)   // mark isn't set in reg_buf
+		{
+		    status = RA_NOMATCH;
+		}
+		else
+		{
+		    colnr_T pos_col = pos->lnum == rex.lnum + rex.reg_firstlnum
+							  && pos->col == MAXCOL
+				      ? (colnr_T)STRLEN(reg_getline(
+						pos->lnum - rex.reg_firstlnum))
+				      : pos->col;
+
+		    if ((pos->lnum == rex.lnum + rex.reg_firstlnum
+				? (pos_col == (colnr_T)(rex.input - rex.line)
 				    ? (cmp == '<' || cmp == '>')
-				    : (pos->col < (colnr_T)(rex.input - rex.line)
+				    : (pos_col < (colnr_T)(rex.input - rex.line)
 					? cmp != '>'
 					: cmp != '<'))
 				: (pos->lnum < rex.lnum + rex.reg_firstlnum
 				    ? cmp != '>'
 				    : cmp != '<')))
 		    status = RA_NOMATCH;
+		}
 	    }
 	    break;