This PR addresses issue #5180 by fixing a variable naming inconsistency in the documentation for Zod's coercion feature. The code example in the "Customizing the input type" section had a mismatch between the variable declaration and its usage in type definitions.

The Problem

In the documentation at https://zod.dev/api?id=coercion, under the "Customizing the input type" accordion section, there was a code snippet demonstrating how to work with coercion schemas:

// Before (incorrect):
const regular = z.coerce.string();
type RegularInput = z.input<typeof regularCoerce>; // => unknown
type RegularOutput = z.output<typeof regularCoerce>; // => string

The variable was declared as regular but referenced as regularCoerce in the subsequent type definitions, which would cause a TypeScript error if users copied this code directly.

The Solution

This PR corrects the variable name to be consistent throughout the example:

// After (correct):
const regularCoerce = z.coerce.string();
type RegularInput = z.input<typeof regularCoerce>; // => unknown
type RegularOutput = z.output<typeof regularCoerce>; // => string

Impact

• Documentation clarity: Users copying code examples from the documentation will no longer encounter reference errors
• Learning experience: Removes confusion for developers learning about Zod's coercion feature
• No breaking changes: This is purely a documentation fix with no impact on the library's functionality

File Changed

• packages/docs/content/api.mdx (line 98)

Testing

• Verified the fix renders correctly in the documentation
• Confirmed no impact on existing tests (pre-existing test failures are unrelated to this documentation change)
• The change is isolated to a single line in the documentation file

Related Issues

Fixes #5180

Additional Context

This issue was initially identified by @daniel-campbell who correctly pointed out that the variable naming was inconsistent. The fix ensures that the documentation provides accurate, copy-paste-ready code examples for users learning about Zod's coercion capabilities with custom input types.