micropython · dhalbert · Apr 9, 2026 · Apr 13, 2026 · Apr 15, 2026 · Apr 15, 2026
diff --git a/tests/basics/string_tstring_basic.py b/tests/basics/string_tstring_basic.py
@@ -172,7 +172,8 @@
 print("\n=== Interpolation attribute tests ===")
 i_basic = Interpolation(42, "x")
 print(f"Basic conversion: {i_basic.conversion}")
-print(f"Basic format_spec: {i_basic.format_spec}")
+# Put in quotes to make empty string visible.
+print(f"Basic format_spec: '{i_basic.format_spec}'")
 
 i_with_conv = Interpolation(42, "x", "s")
 print(f"With conversion: {i_with_conv.conversion}")

diff --git a/tests/basics/string_tstring_basic.py.exp b/tests/basics/string_tstring_basic.py.exp
@@ -71,7 +71,7 @@ Nested expr: Template(strings=('', ''), interpolations=(Interpolation('{}', 'inn
 
 === Interpolation attribute tests ===
 Basic conversion: None
-Basic format_spec: 
+Basic format_spec: ''
 With conversion: s
 With format_spec: :>10
 Full conversion: r

diff --git a/tests/cmdline/cmd_showbc.py.exp b/tests/cmdline/cmd_showbc.py.exp
@@ -185,7 +185,7 @@ arg names:
 58 UNARY_OP 1 __neg__
 59 STORE_FAST 9
 60 LOAD_FAST 0
-61 UNARY_OP 3 
+61 UNARY_OP 3 \$
 62 STORE_FAST 10
 63 LOAD_FAST 0
 64 LOAD_DEREF 14
@@ -206,7 +206,7 @@ arg names:
 84 LOAD_DEREF 14
 86 LOAD_FAST 1
 87 BINARY_OP 2 __eq__
-88 UNARY_OP 3 
+88 UNARY_OP 3 \$
 89 STORE_FAST 10
 90 LOAD_DEREF 14
 92 LOAD_ATTR c

diff --git a/tests/cmdline/cmd_showbc_const.py.exp b/tests/cmdline/cmd_showbc_const.py.exp
@@ -76,7 +76,7 @@ arg names:
 34 RAISE_OBJ
 35 DUP_TOP
 36 LOAD_NAME AttributeError
-38 BINARY_OP 8 
+38 BINARY_OP 8 \$
 39 POP_JUMP_IF_FALSE 44
 41 POP_TOP
 42 POP_EXCEPT_JUMP 45

diff --git a/tests/cmdline/repl_autocomplete.py.exp b/tests/cmdline/repl_autocomplete.py.exp
@@ -11,4 +11,4 @@ Type "help()" for more information.
 >>> i.lower('ABC')
 'abc'
 >>> None.[K[K[K[K[K
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_autocomplete_underscore.py b/tests/cmdline/repl_autocomplete_underscore.py
@@ -7,21 +7,20 @@ def __init__(self):
         self.public_attr = 1
         self._private_attr = 2
         self.__very_private = 3
-    
+
     def public_method(self):
         pass
-    
+
     def _private_method(self):
         pass
-    
+
     @property
     def public_property(self):
         return 42
-    
-    @property  
+
+    @property
     def _private_property(self):
         return 99
-
 {\x04}
 # Paste executed
 

diff --git a/tests/cmdline/repl_autocomplete_underscore.py.exp b/tests/cmdline/repl_autocomplete_underscore.py.exp
@@ -1,41 +1,40 @@
 MicroPython \.\+ version
 Type "help()" for more information.
 >>> # Test REPL autocompletion filtering of underscore attributes
->>> 
+>>> \$
 >>> # Start paste mode
->>> 
+>>> \$
 paste mode; Ctrl-C to cancel, Ctrl-D to finish
-=== 
+=== \$
 === class TestClass:
 ===     def __init__(self):
 ===         self.public_attr = 1
 ===         self._private_attr = 2
 ===         self.__very_private = 3
-===     
+=== \$
 ===     def public_method(self):
 ===         pass
-===     
+=== \$
 ===     def _private_method(self):
 ===         pass
-===     
+=== \$
 ===     @property
 ===     def public_property(self):
 ===         return 42
-===     
-===     @property  
+=== \$
+===     @property
 ===     def _private_property(self):
 ===         return 99
-=== 
-=== 
+=== \$
 >>> # Paste executed
->>> 
+>>> \$
 >>> # Create an instance
 >>> obj = TestClass()
->>> 
+>>> \$
 >>> # Test tab completion on the instance
 >>> # The tab character after `obj.` and 'a' below triggers the completions
 >>> obj.public_
 public_attr     public_method   public_property
 >>> obj.public_attr
 1
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_autoindent.py.exp b/tests/cmdline/repl_autoindent.py.exp
@@ -3,20 +3,20 @@ Type "help()" for more information.
 >>> # tests for autoindent
 >>> if 1:
 ...     print(1)
-...     
-...     
-... 
+...     \$
+...     \$
+... \$
 1
 >>> if 0:
 ...      print(2)
 ... else:
 ...   print(3)
-... 
+... \$
 3
 >>> if 0:
 ...     print(4)
 ... else:
 ...     print(5)
-... 
+... \$
 5
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_basic.py.exp b/tests/cmdline/repl_basic.py.exp
@@ -7,4 +7,4 @@ Type "help()" for more information.
 1
 >>> 2
 2
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_cont.py.exp b/tests/cmdline/repl_cont.py.exp
@@ -54,4 +54,4 @@ two
 >>> if1 = 2
 >>> print(if1)
 2
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_emacs_keys.py.exp b/tests/cmdline/repl_emacs_keys.py.exp
@@ -16,4 +16,4 @@ Type "help()" for more information.
 >>> t = 121
 >>> \.\+
 'foobar'
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_inspect.py.exp b/tests/cmdline/repl_inspect.py.exp
@@ -3,4 +3,4 @@ MicroPython \.\+ version
 Type "help()" for more information.
 >>> # cmdline: -i -c print("test")
 >>> # -c option combined with -i option results in REPL
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_micropyinspect.py.exp b/tests/cmdline/repl_micropyinspect.py.exp
@@ -2,4 +2,4 @@ MicroPython \.\+ version
 Type "help()" for more information.
 >>> # cmdline: cmdline/repl_micropyinspect
 >>> # setting MICROPYINSPECT environment variable before program exit triggers REPL
->>> 
+>>> \$
diff --git a/tests/cmdline/repl_paste.py b/tests/cmdline/repl_paste.py
@@ -26,10 +26,10 @@ def calculate(n):
 {\x05}
 def function_with_blanks():
     print('First line')
-    
+{\x20}{\x20}{\x20}{\x20}
     print('After blank line')
-    
-    
+{\x20}{\x20}{\x20}{\x20}
+{\x20}{\x20}{\x20}{\x20}
     print('After two blank lines')
 
 function_with_blanks()
@@ -40,10 +40,10 @@ def function_with_blanks():
 class TestClass:
     def __init__(self, value):
         self.value = value
-    
+{\x20}{\x20}{\x20}{\x20}
     def display(self):
         print(f'Value is: {self.value}')
-    
+{\x20}{\x20}{\x20}{\x20}
     def double(self):
         self.value *= 2
         return self.value
@@ -82,7 +82,7 @@ def bad_syntax(:
 {\x05}
 def will_error():
     undefined_variable
-    
+{\x20}{\x20}{\x20}{\x20}
 will_error()
 {\x04}
-Original file line number
+Diff line change
@@ Expand Up / @@ -11,4 +11,4 @@ Type "help()" for more information. @@
     >>> i.lower('ABC')
     'abc'
     >>> None.[K[K[K[K[K
-    >>>
+    >>> \$
Original file line number	Diff line number	Diff line change
Expand Up		@@ -7,4 +7,4 @@ Type "help()" for more information.
		1
		>>> 2
		2
		>>>
		>>> \$