updated export-exchanges.js duplicate header bugfix

export-exchanges.js

@@ -112,10 +112,10 @@ lines[1] = headerLine.join ('|')
 
 lines = lines.map (line => '|' + line + '|').join ("\n")
 
-let changeInFile = (filename) => {
+let changeInFile = (filename, prefix = '') => {
     log.bright ('Exporting exchanges to'.cyan, filename.yellow, '...')
     let oldContent = fs.readFileSync (filename, 'utf8')
-    let beginning = "# Supported Exchanges\n\nThe ccxt library currently supports the following "
+    let beginning = prefix + "The ccxt library currently supports the following "
     let ending = " cryptocurrency exchange markets and trading APIs:\n\n"
     let regex = new RegExp ("[^\n]+[\n][\n]\\|[^#]+\\|([\n][\n]|[\n]$|$)", 'm')
     let totalString = beginning + numExchanges + ending
@@ -126,8 +126,8 @@ let changeInFile = (filename) => {
 }
 
 changeInFile ('README.md')
-changeInFile (wikiPath + '/Exchange-Markets.md')
-changeInFile (wikiPath + '/Manual.md')
+changeInFile (wikiPath + '/Exchange-Markets.md', "# Supported Exchanges\n\n")
+changeInFile (wikiPath + '/Manual.md', "# Supported Exchanges\n\n")
 
 // console.log (typeof countries)
 // console.log (countries)