Add tasks for all the new languages

Task/Here-document/Phix/here-document.phix

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+string ts1 = """
+this
+"string"\thing"""
+
+string ts2 = """this
+"string"\thing"""
+
+string ts3 = """
+_____________this
+             "string"\thing"""
+
+string ts4 = `
+this
+"string"\thing`
+
+string ts5 = `this
+"string"\thing`
+
+string ts6 = `
+_____________this
+             "string"\thing`
+
+string ts7 = "this\n\"string\"\\thing"
+
+constant tests={ts1,ts2,ts3,ts4,ts5,ts6,ts7}
+for i=1 to length(tests) do
+    for j=1 to length(tests) do
+        if tests[i]!=tests[j] then crash("error") end if
+    end for
+end for
+printf(1,"""
+____________Everything
+            (all %d tests)
+            works
+             just
+            file.""",length(tests))
+printf(1,"""`""")
+printf(1,`"""`)