pre-commit: fix prettier formatting in doc/guides/capi.md

Co-authored-by: Claude <noreply@anthropic.com>

doc/guides/capi.md

@@ -100,7 +100,7 @@ mrb_str_to_cstr(mrb, v)     /* const char* from String value */
 ### Value Types
 
 | `mrb_vtype`        | Ruby Class          | Notes                    |
-| ----------- | ---------- | ----- |
+| ------------------ | ------------------- | ------------------------ |
 | `MRB_TT_FALSE`     | FalseClass/NilClass | `nil` has `MRB_TT_FALSE` |
 | `MRB_TT_TRUE`      | TrueClass           |                          |
 | `MRB_TT_INTEGER`   | Integer             | Immediate value          |
@@ -166,7 +166,7 @@ mrb_define_module_function(mrb, mod, "name", my_method, MRB_ARGS_ANY());
 ### Argument Specifiers
 
 | Macro                  | Meaning                               |
-| ----- | ------- |
+| ---------------------- | ------------------------------------- |
 | `MRB_ARGS_NONE()`      | No arguments                          |
 | `MRB_ARGS_REQ(n)`      | `n` required arguments                |
 | `MRB_ARGS_OPT(n)`      | `n` optional arguments                |
@@ -193,7 +193,7 @@ mrb_int mrb_get_args(mrb_state *mrb, const char *format, ...);
 ### Format Specifiers
 
 | Spec | Ruby Type     | C Type(s)                   | Notes                            |
-| ---- | --------- | --------- | ----- |
+| ---- | ------------- | --------------------------- | -------------------------------- |
 | `o`  | any           | `mrb_value`                 | No type check                    |
 | `i`  | Numeric       | `mrb_int`                   | Coerces to integer               |
 | `f`  | Numeric       | `mrb_float`                 | Coerces to float                 |
@@ -609,7 +609,7 @@ my_yield_method(mrb_state *mrb, mrb_value self)
 ### Fiber States
 
 | State                   | Meaning                          |
-| ----- | ------- |
+| ----------------------- | -------------------------------- |
 | `MRB_FIBER_CREATED`     | Created but not yet resumed      |
 | `MRB_FIBER_RUNNING`     | Currently executing              |
 | `MRB_FIBER_RESUMED`     | Resumed another fiber            |
@@ -645,7 +645,7 @@ mrb_ccontext_free(mrb, cxt);
 The `mrb_ccontext` structure provides several flags:
 
 | Field            | Purpose                                 |
-| ----- | ------- |
+| ---------------- | --------------------------------------- |
 | `capture_errors` | Collect parse errors instead of raising |
 | `no_exec`        | Compile without executing (get RProc)   |
 | `no_optimize`    | Disable peephole optimizations          |
@@ -844,7 +844,7 @@ $ build/host/bin/mruby-config --libs      # libraries
 Key macros that affect ABI:
 
 | Macro             | Effect                                   |
-| ----- | ------ |
+| ----------------- | ---------------------------------------- |
 | `MRB_NO_BOXING`   | Struct-based values (larger, debuggable) |
 | `MRB_WORD_BOXING` | Single-word values (fast, 32-bit safe)   |
 | `MRB_NAN_BOXING`  | NaN-tagged values (default on 32-bit)    |