Format gn src with run_formatter.sh

A previous commit (8dc9a796) used git cl format, but the correct
formatter is tools/run_formatter.sh.

This CL contains no functional changes.

Bug: None
Change-Id: I7ace5bac2115f05d11a259902743b023b6b6137b
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/22620
Reviewed-by: Andrew Grieve <agrieve@google.com>
Reviewed-by: Takuto Ikuta <tikuta@google.com>
Commit-Queue: Will Harris <wfh@chromium.org>

src/gn/command_format.cc

diff --git a/src/gn/command_format.cc b/src/gn/command_format.cc
index f1ce0df..f7649cd 100644
--- a/src/gn/command_format.cc
+++ b/src/gn/command_format.cc
@@ -376,10 +376,10 @@
 
     // A single word (e.g. a long file path) should not be joined with other
     // lines, as it often represents a vertical list of items.
-    bool is_single_word =
-        !text_only.empty() && text_only.find(' ') == std::string::npos &&
-        (text_only.find('/') != std::string::npos ||
-         text_only.find(':') != std::string::npos);
+    bool is_single_word = !text_only.empty() &&
+                          text_only.find(' ') == std::string::npos &&
+                          (text_only.find('/') != std::string::npos ||
+                           text_only.find(':') != std::string::npos);
 
     // Attention markers start a new paragraph to ensure they remain visible.
     bool is_attention_marker =