Fix an off-by-one bug with column limit handling for text blocks

PiperOrigin-RevId: 695348215

Author: cushon

core/src/main/java/com/google/googlejavaformat/java/StringWrapper.java

@@ -205,7 +205,8 @@ private void indentTextBlocks(
             initialLines.get(1).stripTrailing().length() - lines.get(0).stripTrailing().length();
 
         String prefix =
-            (deindent == 0 || lines.stream().anyMatch(x -> x.length() + startColumn > columnLimit))
+            (deindent == 0
+                    || lines.stream().anyMatch(x -> x.length() + startColumn - 1 > columnLimit))
                 ? ""
                 : " ".repeat(startColumn - 1);
 

core/src/test/resources/com/google/googlejavaformat/java/testdata/B361077825.input

@@ -0,0 +1,15 @@
+class T {
+  String a =
+      """
+               # No implicit input file, because they can only be created outside a symbolic macro,
+      """;
+
+  String b =
+      """
+                # No implicit input file, because they can only be created outside a symbolic macro,
+      """;
+  String c =
+      """
+                 # No implicit input file, because they can only be created outside a symbolic macro,
+      """;
+}

core/src/test/resources/com/google/googlejavaformat/java/testdata/B361077825.output

@@ -0,0 +1,15 @@
+class T {
+  String a =
+      """
+               # No implicit input file, because they can only be created outside a symbolic macro,
+      """;
+
+  String b =
+      """
+                # No implicit input file, because they can only be created outside a symbolic macro,
+      """;
+  String c =
+"""
+           # No implicit input file, because they can only be created outside a symbolic macro,
+""";
+}