Remove underscores from test names with the pattern "BUG_NUMBER"

Tests written with the GoogleTest framework should not use underscores
in test names.

Bug: 42270790
Change-Id: I5acfa175479d4d93b19fa261868cde2d2f66f043
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/121190
Reviewed-by: Tom Sepez <tsepez@google.com>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdf_sysfontinfo_embeddertest.cpp b/fpdfsdk/fpdf_sysfontinfo_embeddertest.cpp
index dcdbb26..9751bfb 100644
--- a/fpdfsdk/fpdf_sysfontinfo_embeddertest.cpp
+++ b/fpdfsdk/fpdf_sysfontinfo_embeddertest.cpp
@@ -123,7 +123,7 @@
 
 }  // namespace
 
-TEST_F(FPDFUnavailableSysFontInfoEmbedderTest, Bug_972518) {
+TEST_F(FPDFUnavailableSysFontInfoEmbedderTest, Bug972518) {
   ASSERT_TRUE(OpenDocument("bug_972518.pdf"));
   ASSERT_EQ(1, FPDF_GetPageCount(document()));