[LyX/2.3.x] Use pythonic syntax, as suggested by José.

[Richard Heck]

commit 96ec4d645bd3c24f4a08d59ac6bd4f9b9264a234
Author: Richard Heck <rgh...@lyx.org>
Date:   Fri Mar 2 23:02:26 2018 -0500

    Use pythonic syntax, as suggested by José.
    
    (cherry picked from commit cec9edd34b9a43beadefd55d1755209e1acff191)
---
 lib/configure.py |    4 ++--
 status.23x       |    2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/configure.py b/lib/configure.py
index 23ec3c8..b3d1f69 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1772,8 +1772,8 @@ def rescanTeXFiles():
     interpreter = sys.executable
     if interpreter == '':
         interpreter = "python"
-    tfp = cmdOutput(interpreter + " -tt " + '"'
-                    + os.path.join(srcdir, 'scripts', 'TeXFiles.py') + '"')
+    tfp = cmdOutput('"%s" -tt "%s"' % (interpreter,\
+          os.path.join(srcdir, 'scripts', 'TeXFiles.py')))
     logger.info(tfp)
     logger.info("\tdone")
 
diff --git a/status.23x b/status.23x
index e1cfddb..18ed4fa 100644
--- a/status.23x
+++ b/status.23x
@@ -65,6 +65,8 @@ What's new
 
 * INTERNALS
 
+- Properly quote python interpreter when scanning TeX files.
+
 
 * DOCUMENTATION AND LOCALIZATION