docu update

doc/tex/mod/CMOR

@@ -7,7 +7,7 @@
 @Operators = cmor
 
 @BeginDescription
-Options is a comma separated list of key-value pairs with optional parameters.
+Options is a comma separated list of "key=value" pairs with optional parameters.
 @EndDescription
 @EndModule
 

doc/tex/mod/Select

@@ -12,7 +12,7 @@ This module selects some fields from @file{ifiles} and writes them to @file{ofil
 @file{ifiles} is an arbitrary number of input files. All input files need to have 
 the same structure with the same variables on different timesteps.
 The fields selected depends on the chosen parameters. Parameter is a comma
-separated list of key-value pairs. Wildcards can be used for string parameter.
+separated list of "key=value" pairs. Wildcards can be used for string parameter.
 @EndDescription
 @EndModule
 

src/operator_help.h

@@ -476,7 +476,7 @@ static const char *SelectHelp[] = {
     "    ifiles is an arbitrary number of input files. All input files need to have ",
     "    the same structure with the same variables on different timesteps.",
     "    The fields selected depends on the chosen parameters. Parameter is a comma",
-    "    separated list of key-value pairs. Wildcards can be used for string parameter.",
+    "    separated list of \"key=value\" pairs. Wildcards can be used for string parameter.",
     "",
     "OPERATORS",
     "    select  Select fields",