Allow settings.toml to end without a newline

shared-module/os/getenv.c

@@ -201,6 +201,7 @@ STATIC os_getenv_err_t read_string_value(file_arg *active_file, vstr_t *buf) {
                     case '#':
                         next_line(active_file);
                         MP_FALLTHROUGH;
+                    case 0:
                     case '\n':
                         return GETENV_OK;
                     default:
@@ -257,7 +258,6 @@ STATIC os_getenv_err_t read_bare_value(file_arg *active_file, vstr_t *buf, int f
     while (true) {
         switch (character) {
             case 0:
-                return GETENV_ERR_UNEXPECTED | character;
             case '\n':
                 return GETENV_OK;
             case '#':

tests/circuitpython/getenv.py

@@ -75,5 +75,8 @@ def run_test(key, content):
 for i in range(13):
     run_test(f"key{i}", content_good)
 
+# Test value without trailing newline
+run_test(f"noeol", "noeol=3")
+
 for content in content_bad:
     run_test("key", content)

tests/circuitpython/getenv.py.exp

@@ -11,6 +11,7 @@ key9 'hello comment'
 key10 127
 key11 0
 key12 None
+noeol 3
 key Invalid byte '\n'
 key Invalid byte '"'
 key invalid syntax for integer with base 10: ''