include preamble files generated by mylatexformat package

TeX.gitignore

@@ -33,6 +33,7 @@
 
 ## Auxiliary and intermediate files from other packages:
 
+
 # algorithms
 *.alg
 *.loa
@@ -102,6 +103,9 @@ _minted*
 # morewrites
 *.mw
 
+# mylatexformat
+*.fmt
+
 # nomencl
 *.nlo