Fix several typos (#44043)

Author: PApostol

pandas/_libs/groupby.pyx

@@ -532,7 +532,7 @@ def group_add(add_t[:, ::1] out,
                     nobs[lab, j] += 1
 
                     if nobs[lab, j] == 1:
-                        # i.e. we havent added anything yet; avoid TypeError
+                        # i.e. we haven't added anything yet; avoid TypeError
                         #  if e.g. val is a str and sumx[lab, j] is 0
                         t = val
                     else:
@@ -1193,7 +1193,7 @@ def group_rank(float64_t[:, ::1] out,
             na_option=na_option
         )
         for i in range(len(result)):
-            # TODO: why cant we do out[:, k] = result?
+            # TODO: why can't we do out[:, k] = result?
             out[i, k] = result[i]
 
 

pandas/_libs/src/klib/khash.h

@@ -206,7 +206,7 @@ khuint32_t PANDAS_INLINE murmur2_32to32(khuint32_t k){
 }
 
 // it is possible to have a special x64-version, which would need less operations, but
-// using 32bit version always has also some benifits:
+// using 32bit version always has also some benefits:
 //    - one code for 32bit and 64bit builds
 //    - the same case for 32bit and 64bit builds
 //    - no performance difference could be measured compared to a possible x64-version

pandas/_libs/src/klib/khash_python.h

@@ -71,7 +71,7 @@ void traced_free(void* ptr){
 // The python 3 hash function has the invariant hash(x) == hash(int(x)) == hash(decimal(x))
 // and the size of hash may be different by platform / version (long in py2, Py_ssize_t in py3).
 // We don't need those invariants because types will be cast before hashing, and if Py_ssize_t
-// is 64 bits the truncation causes collission issues.  Given all that, we use our own
+// is 64 bits the truncation causes collision issues.  Given all that, we use our own
 // simple hash, viewing the double bytes as an int64 and using khash's default
 // hash for 64 bit integers.
 // GH 13436 showed that _Py_HashDouble doesn't work well with khash
@@ -338,13 +338,13 @@ khuint32_t PANDAS_INLINE kh_python_hash_func(PyObject* key) {
     //    are possible
     if (PyFloat_CheckExact(key)) {
         // we cannot use kh_float64_hash_func
-        // becase float(k) == k holds for any int-object k
+        // because float(k) == k holds for any int-object k
         // and kh_float64_hash_func doesn't respect it
         hash = floatobject_hash((PyFloatObject*)key);
     }
     else if (PyComplex_CheckExact(key)) {
         // we cannot use kh_complex128_hash_func
-        // becase complex(k,0) == k holds for any int-object k
+        // because complex(k,0) == k holds for any int-object k
         // and kh_complex128_hash_func doesn't respect it
         hash = complexobject_hash((PyComplexObject*)key);
     }

pandas/_libs/tslibs/src/datetime/np_datetime_strings.c

@@ -402,7 +402,7 @@ int parse_iso_8601_datetime(const char *str, int len, int want_exc,
     }
 
 parse_timezone:
-    /* trim any whitepsace between time/timeezone */
+    /* trim any whitespace between time/timeezone */
     while (sublen > 0 && isspace(*substr)) {
         ++substr;
         --sublen;

pandas/_libs/tslibs/timezones.pyx

@@ -257,7 +257,7 @@ cdef object get_dst_info(tzinfo tz):
     ndarray[int64_t]
         Nanosecond UTC offsets corresponding to DST transitions.
     str
-        Desscribing the type of tzinfo object.
+        Describing the type of tzinfo object.
     """
     cache_key = tz_cache_key(tz)
     if cache_key is None: