diff -r b79405fbf91d -r 608cc0b25352 docs/Writerside/topics/string.h.md
--- a/docs/Writerside/topics/string.h.md	Wed Dec 24 12:13:59 2025 +0100
+++ b/docs/Writerside/topics/string.h.md	Thu Dec 25 11:10:13 2025 +0100
@@ -119,27 +119,24 @@
 ```C
 #include <cx/string.h>
 
-cxmutstr cx_strcat(size_t count, ... );
-
-cxmutstr cx_strcat_a(const CxAllocator *alloc, size_t count, ... );
+int cx_strcat(cxmutstr *str, size_t count, ... );
 
-cxmutstr cx_strcat_m(cxmutstr str, size_t count, ... );
-
-cxmutstr cx_strcat_ma(const CxAllocator *alloc,
-        cxmutstr str, size_t count, ... );
+int cx_strcat_a(const CxAllocator *allocator,
+        cxmutstr *str, size_t count, ... );
 
 size_t cx_strlen(size_t count, ...);
 ```
 
-The `cx_strcat_a()` function takes `count` UCX strings (`cxstring` or `cxmutstr`),
-allocates memory for a concatenation of those strings _with a single allocation_,
-and copies the contents of the strings to the new memory.
+The `cx_strcat_a()` function takes `count` UCX strings (`cxstring` or `cxmutstr` - not pointers!),
+allocates memory in `str` for a concatenation of those strings _with a single allocation_,
+and appends the contents of the strings to `str`.
 `cx_strcat()` is equivalent, except that it uses the [default allocator](allocator.h.md#default-allocator).
 
-The `cx_strcat_ma()` and `cx_strcat_m()` append the `count` strings to the specified string `str` and,
-instead of allocating new memory, reallocate the existing memory in `str`.
-If the pointer in `str` is `NULL`, there is no difference to `cx_strcat_a()`.
-Note, that `count` always denotes the number of variadic arguments in _both_ variants.
+Example usage:
+```C
+cxmutstr str = {0};
+cx_strcat(&str, 2, cx_str("Hello, "), cx_str("World!"));
+```
 
 The function `cx_strlen()` sums the length of the specified strings.