diff --git a/doc/docgen.zig b/doc/docgen.zig
index 52f373f5b..6916318eb 100644
--- a/doc/docgen.zig
+++ b/doc/docgen.zig
@@ -1251,7 +1251,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: any
                             },
                         }
                         if (mem.indexOf(u8, result.stderr, error_match) == null) {
-                            print("{}\nExpected to find '{}' in stderr", .{ result.stderr, error_match });
+                            print("{}\nExpected to find '{}' in stderr\n", .{ result.stderr, error_match });
                             return parseError(tokenizer, code.source_token, "example did not have expected compile error", .{});
                         }
                         const escaped_stderr = try escapeHtml(allocator, result.stderr);
@@ -1306,7 +1306,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: any
                             },
                         }
                         if (mem.indexOf(u8, result.stderr, error_match) == null) {
-                            print("{}\nExpected to find '{}' in stderr", .{ result.stderr, error_match });
+                            print("{}\nExpected to find '{}' in stderr\n", .{ result.stderr, error_match });
                             return parseError(tokenizer, code.source_token, "example did not have expected runtime safety error message", .{});
                         }
                         const escaped_stderr = try escapeHtml(allocator, result.stderr);
@@ -1385,7 +1385,7 @@ fn genHtml(allocator: *mem.Allocator, tokenizer: *Tokenizer, toc: *Toc, out: any
                                 },
                             }
                             if (mem.indexOf(u8, result.stderr, error_match) == null) {
-                                print("{}\nExpected to find '{}' in stderr", .{ result.stderr, error_match });
+                                print("{}\nExpected to find '{}' in stderr\n", .{ result.stderr, error_match });
                                 return parseError(tokenizer, code.source_token, "example did not have expected compile error message", .{});
                             }
                             const escaped_stderr = try escapeHtml(allocator, result.stderr);
diff --git a/doc/langref.html.in b/doc/langref.html.in
index 31d3b9b1e..ae5ff666d 100644
--- a/doc/langref.html.in
+++ b/doc/langref.html.in
@@ -8713,7 +8713,7 @@ fn foo(x: []const u8) u8 {
       {#header_close#}
       {#header_open|Cast Negative Number to Unsigned Integer#}
       <p>At compile-time:</p>
-      {#code_begin|test_err|cannot cast negative value -1 to unsigned integer type 'u32'#}
+      {#code_begin|test_err|attempt to cast negative value to unsigned integer#}
 comptime {
     const value: i32 = -1;
     const unsigned = @intCast(u32, value);
@@ -8735,7 +8735,7 @@ pub fn main() void {
       {#header_close#}
       {#header_open|Cast Truncates Data#}
       <p>At compile-time:</p>
-      {#code_begin|test_err|integer value 300 cannot be coerced to type 'u8'#}
+      {#code_begin|test_err|cast from 'u16' to 'u8' truncates bits#}
 comptime {
     const spartan_count: u16 = 300;
     const byte = @intCast(u8, spartan_count);