Update to v1.5.

The update to version 1.5 is rather substantial, and introduces some minor
  backward-incompatibilities:
    * The header "#!symbols" has been replaced by "#!virtual_fields"
    * Multiplying polynomials using the '*' symbol is no longer supported (or,
      rather, the symbolic capabilities of meankondo were enhanced, and the
      syntax has been changed).
    * 'meantools exp' has been removed (its functionality is now handled by
      other means)
    * 'meantoolds derive' has been replaced by 'meantools differentiate'

  * The symbolic capabilities were enhanced: polynomials can now be
    multiplied, added, exponentiated, and their logarithms can be taken
    directly in the configuration file.

  * The flow equation can now be processed after being computed using the
    various "#!postprocess_*" entries.

  * Deprecated kondo_preprocess.

  * Compute the mean using an LU decomposition if possible.

  * More detailed checks for syntax errors in configuration file.

  * Check that different '#!group' entries are indeed uncorrelated.

  * New flags in meankondo: '-p' and '-A'.

  * New tool: meantools expand.

  * Improve conversion to LaTeX using meantools-convert

  * Assign terms randomly to different threads.

  * Created vim files to implement syntax highlighting for configuration
    files.

  * Multiple bug fixes

scripts/meantools-convert

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-## Copyright 2015 Ian Jauslin
+## Copyright 2015-2022 Ian Jauslin
 ## 
 ## Licensed under the Apache License, Version 2.0 (the "License");
 ## you may not use this file except in compliance with the License.
@@ -76,8 +76,8 @@ def latex_engine(argv,text):
 
     i=1
     # defaults
-    lsym="\\ell"
-    Lsym="\\ell'"
+    lsym=r'\\ell'
+    Lsym=r'\\ell'
     Csym="C"
     oneline=1
     while (i<argc):
@@ -171,6 +171,10 @@ def convert_latex(text, lsym, Lsym, Csym, oneline):
     # remove extra space
     text=re.sub(r' {2,}',' ',text)
 
+    # remove unnecessary 1's
+    text=re.sub(r'\(-1\)\[',r'-[',text)
+    text=re.sub(r'\(1\)\[',r'[',text)
+
     # replace left hand side variables
     text=re.sub(r'\[(d*)C *([0-9]*)\] =',r'@\1'+Csym+r'_{\2} =', text)
     text=re.sub(r'\[(d*)% *([0-9]*)\] =',r'@\1'+Lsym+r'_{\2} =', text)
@@ -213,7 +217,11 @@ def convert_latex(text, lsym, Lsym, Csym, oneline):
     # fractions
     text=re.sub(r'\((-?)([0-9]*)/([0-9]*)\)',r'\1\\frac{\2}{\3}',text)
     # numbers
-    text=re.sub(r'\(([-0-9]*)\)',r'\1',text)
+    #text=re.sub(r'\(([-0-9]*)\)',r'\1',text)
+
+    # fix signs
+    text=re.sub(r'\+-',r'-',text)
+
 
 
     return(text)