[Rust] updated generator to create "_from_iter" and "_zero_padded" functions for primitive array

Author: Michael Ward

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/rust/RustGenerator.java

@@ -436,7 +436,7 @@ private static void generatePrimitiveArrayZeroPaddedEncoder(
         indent(sb, level + 1, "let iter = value.iter().copied().chain(std::iter::repeat(0_%s)).take(%d);\n",
             rustPrimitiveType, arrayLength);
 
-        indent(sb, level + 1, "self.%s_from_iter(iter);", formatFunctionName(name));
+        indent(sb, level + 1, "self.%s_from_iter(iter);\n", formatFunctionName(name));
         indent(sb, level, "}\n\n");
     }