[LyX/master] Partial fix for #12605

[Enrico Forestieri]

commit ae961f004b5c9bb10f4cab0f41e5f3c33d7c183a
Author: Enrico Forestieri <forenr at lyx.org>
Date:   Sat Dec 10 11:31:51 2022 +0100

    Partial fix for #12605
    
    The equation number is now correctly generated when using
    \ref in \tag, but if equations are numbered within sections,
    the \tag'ed equations in the first sections are numbered wrongly.
    
    However, I think this is a preview.sty bug not a lyx one.
---
 lib/scripts/lyxpreview_tools.py |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/scripts/lyxpreview_tools.py b/lib/scripts/lyxpreview_tools.py
index cca359e..1a6b1c1 100644
--- a/lib/scripts/lyxpreview_tools.py
+++ b/lib/scripts/lyxpreview_tools.py
@@ -293,7 +293,7 @@ def run_latex(latex, latex_file, bibtex = None):
         latex_status, latex_stdout = run_tex(latex, latex_file)
     # Rerun latex if necessary
     progress("Checking if a latex rerun is necessary")
-    if string_in_file("Warning: Citation", log_file):
+    if string_in_file("Warning: (Citation|Reference)", log_file):
         latex_status, latex_stdout = run_tex(latex, latex_file)
 
     return latex_status, latex_stdout
@@ -312,9 +312,10 @@ def run_tex(tex, tex_file):
 def string_in_file(string, infile):
     if not os.path.isfile(infile):
         return False
+    string_re = re.compile(string.encode())
     f = open(infile, 'rb')
     for line in f.readlines():
-        if string.encode() in line:
+        if string_re.search(line):
             f.close()
             return True
     f.close()