diff --git a/compilerAst/src/prog8/parser/ModuleParsing.kt b/compilerAst/src/prog8/parser/ModuleParsing.kt
index 87eba5d40..4c0b0a8ef 100644
--- a/compilerAst/src/prog8/parser/ModuleParsing.kt
+++ b/compilerAst/src/prog8/parser/ModuleParsing.kt
@@ -44,7 +44,10 @@ class ModuleImporter(private val program: Program,
         if(!Files.isReadable(filePath))
             throw ParsingFailedError("No such file: $filePath")
 
-        val content = filePath.toFile().readText().replace("\r\n", "\n")
+        var content = filePath.toFile().readText().replace("\r\n", "\n")    // normalize line endings
+        if(content.last()!='\n')
+            content+='\n'   // grammar requires blocks (and thus module files) to end in an EOL
+
         return importModule(CharStreams.fromString(content), filePath, false)
     }
 
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index b46914cfd..12084c221 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -4,8 +4,9 @@ TODO
 
 - possible idea: option to mark vardecls 'shared' to indicate they should not be optimized away because they're shared with assembly code?
   However: who even needs variables declared in prog8 code that are only used by assembly???
-- github issue: make strings no longer immutable? Deduplication selectable via command line switch?
-    IMPROVE DOCUMENTATION ABOUT STRINGS AND DEDUP.
+- github issue about strings and their immutability:
+    StatementOptimizer line 60: only optimize when it's a known constant literal
+    IMPROVE DOCUMENTATION ABOUT STRINGS AND DEDUP and (NON)IMMUTABILITY.
 
 - test all examples before release of the new version