Toast parsing comment as var
When
> toast --preprocess -mc --prefix=_ -f:ast2 --pnim -o libyang/context.nim [../tmp/libyang/context.h](https://github.com/CESNET/libyang/blob/master/src/context.h#L164)


The code:
```c
#define LY_CTX_ALL_IMPLEMENTED 0x01 /**< All the imported modules of the schema being parsed are implemented. */
#define LY_CTX_REF_IMPLEMENTED 0x02 /**< Implement all imported modules "referenced" from an implemented module.
                                        Normally, leafrefs, augment and deviation targets are implemented as
                                        specified by YANG 1.1. In addition to this, implement any modules of
                                        nodes referenced by when and must conditions and by any default values.
                                        Generally, only if all these modules are implemented, the explicitly
                                        implemented modules can be properly used and instantiated in data. */
```

It produces:
```nim
var
  deviation* {.importc, impcontextHdr.}: `and`
  are* {.importc, impcontextHdr.}: targets
  `as`* {.importc: "as", impcontextHdr.}: implemented
  modules* {.importc, impcontextHdr.}: any
  nodes* {.importc, impcontextHdr.}: `of`
  by* {.importc, impcontextHdr.}: referenced
  `and`* {.importc: "and", impcontextHdr.}: `when`
  conditions* {.importc, impcontextHdr.}: must
  default* {.importc, impcontextHdr.}: any
  implemented* {.importc, impcontextHdr.}: explicitly
  can* {.importc, impcontextHdr.}: modules
  properly* {.importc, impcontextHdr.}: be
  `in`* {.importc: "in", impcontextHdr.}: instantiated
```

if the comment is in a new line those problems where resolved

Context:
- nimterop-0.6.13
- uname -r 5.10.36-2-MANJARO
- ldd toast:
        linux-vdso.so.1
	libm.so.6 => glibc-2.33-47/lib/libm.so.6
	librt.so.1 =>glibc-2.33-47/lib/librt.so.1
	libdl.so.2 => glibc-2.33-47/lib/libdl.so.2
	libstdc++.so.6 => not found
	libgcc_s.so.1 => glibc-2.33-47/lib/libgcc_s.so.1
	libc.so.6 => glibc-2.33-47/lib/libc.so.6
	/lib64/ld-linux-x86-64.so.2 => glibc-2.33-47/lib64/ld-linux-x86-64.so.2
	libpthread.so.0 => glibc-2.33-47/lib/libpthread.so.0