An edge case, I am sure, but the following valid line of Apex:

    private static Set<string> FindMergeTags(string template, string splitter)
    {
        string[] tempParts = template.split('\\' + splitter + '(.*?)');
        Set<string> fields = new Set<string>();

Gets modified into invalid Apex when using WelkinSuite's Format Code option:

	private static Set<string> FindMergeTags(string template, string splitter)
	{
		string[] tempParts = template.split('\\' + splitter + '(.* ?)
		                                    Set<string> fields = new Set<string> ();